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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Wear behaviors and lubrication medium of
TiC/Al2O3 ceramic wire drawing dies
YANG Xue-feng(杨学锋)1, DENG Jian-xin(邓建新) 2, WANG Hui(王  慧)1, ZE Xiang-bo(昃向博)1

1. Department of Mechanical Engineering, University of Jinan, Jinan 250022, China;
2. Department of Mechanical Engineering, Shandong University, Jinan 250061 China

Abstract:The suitable test equipment for wire-drawing was designed. Wire-drawing tests were carried on with this equipment for TiC/Al2O3 ceramic wire-drawing die. Effect of lubrication medium and drawing velocity on the drawing force was investigated. The wear mechanisms of the ceramic drawing dies were investigated. Worn bore surfaces of the ceramic drawing dies were examined by scanning electron microscopy. The results show that lubricant media have great influence on the drawing force. The drawing force is the smallest when a grease lubricant is used. But alteration of drawing velocity has scarcely any influence on the drawing force. Detailed observations and analyses of the die wear surface reveal that the most common failure of the ceramic drawing die is the wear in the invariable zone and bearing zone owing to the greater press stresses. Abrasive and adhesive wear are found to be the predominant wear mechanisms for ceramic drawing die.

 

Key words: wear behaviors; lubricant properties; drawing process; ceramic mould materials; wire drawing dies

ISSN 1672-7029
CN 43-1423/U

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